CRYO: a System-On-Chip ASIC for Noble Liquid TPC Experiments

CRYO ASIC is a System-On-Chip (SoC) waveform digitizer and serializer for Time Projection Chamber experiments operating at cryogenic temperatures. Implemented in 130 nm CMOS process, this ASIC combines both analog and digital functionalities including signal pre-amplification, waveform digitization, and channel multiplexing. CRYO has been designed to meet the requirements of DUNE (far detector) and nEXO experiments through two different variants, where the preamplification stage has been optimized for the input capacitance of each detector, 150 pF and 40 pF respectively, while all other subsystems remain unchanged. The paper presents the test system and results of the DUNE variant at liquid nitrogen (LN2) and room temperatures. The initial results presented here are based on the built-in charge pulse generator that creates a pulse that mimics what the real detector produces.